Halloween season is here! With Oct. 31 coming up quick, there's no time to waste getting the decorations hung, stocking up on candy for little trick-or-treaters, and putting the finishing touches ...

Add to the fun by pairing up with pals and picking best friend Halloween costumes that’ll wow all the ghosts and ghouls. Of course, there is always the dilemma of what you should dress up as.

Here are 21 of the absolute best celebrity Halloween costumes, artfully pulled off ... as both Elliot and his iconic intergalactic friend, E.T. I hope she received a lot of Reese’s pieces ...